28571888 has 20 divisors (see below), whose sum is σ = 57765648. Its totient is φ = 13664640.

The previous prime is 28571887. The next prime is 28571897. The reversal of 28571888 is 88817582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38453 + ... + 39188.

Almost surely, 2^28571888 is an apocalyptic number.

It is an amenable number.

28571888 is an abundant number, since it is smaller than the sum of its proper divisors (29193760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28571888 is a wasteful number, since it uses less digits than its factorization.

28571888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77672 (or 77666 counting only the distinct ones).

The product of its digits is 286720, while the sum is 47.

The square root of 28571888 is about 5345.2678136834. The cubic root of 28571888 is about 305.7123473335.

The spelling of 28571888 in words is "twenty-eight million, five hundred seventy-one thousand, eight hundred eighty-eight".